Check the serial number in Settings > General > About
Verify the serial number on Apple’s Check Coverage page
Match the serial number on the box, SIM tray, and device
Check the model number in Settings > General > About
Confirm the model number on Apple’s official iPhone model list
Inspect the Apple logo, build quality, and finish
Test Face ID or Touch ID
Check the display quality and touch response
Verify iOS is installed and fully functional
Check for App Store, iMessage, and FaceTime
Confirm the device is not iCloud locked
Check battery health in Settings > Battery > Battery Health
Use Apple Support app or Apple ID login to verify the device
Check IMEI number in Settings > General > About
Compare the IMEI with the box and SIM tray
Ask for the original purchase receipt
Check for genuine Apple accessories and packaging
Verify the device with an Apple Store or authorized service provider